Piston-cleaning tool



April 17, 1928.

J. KLEIN PISTON CLEANING TOOL Filed April 13. 1927 [IIIHVI guyz Swim-mko@ Patented Apr.A 17, y19.28.

vUNITED STATES' l `l i y Y John KLEIN, or sur'V nofUis, iusvs'otfnr. l p

Yrls'ro'1\Ic1.1-ni1`\me, Toon. l

Application filed April V13, 1927. 'Serial No. 183,537.

This invention relates to a toolv for cleaning the grooves of pistons,particularly of the internal combustion engine type, in which piston rings are employed. The tool is also adapted to clean the sides of the pistons, and for this purpose a detachable knifev or scraper blade is securedr'to the tool. vItis an object of the invention to provide a spring-pressed andslidable scraper blade holder and this holder receives a. pair of blades which not only cleans the bottom surface of the piston ring groove but also cleans the sides thereof. It is a further objectvto.

provide an adjustable mounting for one of the blades, so that they can be adjusted to fit any width of thegroo've. A still further object resides in the construction of the detachable'blades. Further objects will be apparent fromj the following specificatiomtaken in connection with the accompanying drawing, in which: Figure 1 is a front view of the cleaning tool shown. in position ona piston, I Fig. 2 is a side view of the outer orfU- shaped portion of the tool,

Fig. Bris a side view of one of the scraper blades and its holder, y

Fig. 4 is a side view of the other scraper bladg,

Fig. 5 is a front view of the blade for cleaning the sides of the piston,

Fig. 6 isasid'e view of theblade of Fig. 5, and f n Fig. 7 isa front vien1 of the connecting member. Y I

The tool comprises two mainparts, 'Qne of which Vis the encirelingfmembei 1 'and the other is the scraper blade liol'der`2. The

memberl comprises an elongated VU-sliaped portion or operating handle 3of any suitable f flat metal such: as brass,cold rolled steel,

etc., and the ends are directed outwardly at 4; and provided with circular portions v5. The ends of the circularportions are secured in Vspaced relation by means of a spacing tube 6 through which a' rod 7 passes lnfhichsecures the straight sections A8. A curved bearing memberv 9 is provided between the-parts 5 and 8. The parts 3, 4, 5, 8 and 9- are preferably madeinteg'ral and vare maintained in spaced relation by the tube 6 at the'to'p end and a connecting or guide member 10 at Vapprormat'e'ly intercutting kedge17 and aside cutting edge of Yon the end thereof ,securesl thev blades in position. In' orderkthatthe blades may be ythat the cutting edge 19 shall Contact on one of the 'blades with' respect to each' other is NT ,y OFFICE. y

mediate thevk ends. i' The other end comprises the bottom of the lU as indicated at 11.

The holder 2 is slidably mounted in the p member 1 on the connecting member 10. This .member 10 is suitably secured in the member 1 by riveting'as indicated at 11. The holder yis providedy withlslots 12 by which it sl'ideson the connect-ing member 10 and in order to urge it voutwardly out of thev U-shaped portion al spring 13 is secured at one fend to thebent portion 36 of the hol'derand the other end in the perforation 14 in the connecting `member. Asclea-rly shown in Fig. 1, if the tool is not in use the spring will force the holder outwardly `to the limit of theslot, but if it isf-desired to y insert the tool on' the 'pistonythe holder is' pushed inwardly against the force of the springV and when in position the spring will urge' the holder outwardly so'that the blades will be forced" against the piston or n into the grooves asthe casemay be. l

j'The' end of the holder is provided with a pair of detachable blades or Scrapers 15 and 16.l Eacli'blade is*` provided lwith an outer whi'cl'ilS- indicatesthe edge for fixed' blade 1G and 19' for the adjustable blade 15. `Also each blade provided with a vperforationy of which the perforation in blade V1 5 is elongated-and the' perforation"21fin blade 16 is circular. A screw 22p`as`s'es1througli the perforati'ons in' ythe blades and 'through the shank `23 of'the holder and 'ai Wingedvnut 24;

held rigid and at the. ,same time parallel to the -aXis of the piston a. pin 25 is y,provided for'eachblade which fi-tsin a groove in the shank and in the blade. l I

vThe yblades 'are mountedbn the shank so side yof the' groovel 26 of 'pistoni 27 as for instance the lower lside 28- and edg'e'g18v conf tac'ts' with the upper yside 29. The edges 17 contact with the bottom 8O of the groove. Uien it lis desiredV to adjust the blades to accommodate a larger' or smaller Width groove the wing nut 24 is loosened and the blade 15I isr moved laterally, due to the elongate'dgper'foration 20, 'untily the desiredy .Width reached, whereafter the Winged nut is dle and curved bearing members adapted toY contact with and bear against the side of the piston; a guide vmember secured in said handle; a holder slidably mounted iny said handle and having slots therein, said holder sliding' on said guide member by means of the slots; a spring, one end or' which is secured to the holder and the other end to the guide member to urge the holder outwardly against the piston; a pair of cleaning and'v scraping blades adjustably mounted relative to each other on said holder adapted to clean and scrape the piston ring groove; and means on the blades and the holder to maintain the blades rigid and parallel to each other.

adjustable blade mounted in said member, each blade having two cutting edges one of which is on `the end and the other on the side to clean and scrape the bottom Vand sides of the piston ring groove.

14. A piston cleaning tool comprising an encircling member; and a iiXed blade and an adjustable blade mounted in said member,

Y each blade having two cutting edges one `oi which is on the end and the other on the side and the blades being mounted so that a side cutting edge shall be on each side of the assembled pair of blades to clean and scrape the bottom and sides of the piston ring groove.

15. A piston cleaning tool con'iprising an 13. A piston cleaning tool comprising anv encircling member; and a fixed blade and an kencircling member; anda pair of blades be on each side of the assembled pair ofV blades to clean and scrape the bottom and sides of the piston ring groove, and one of the blades having an elongated perforation there-in so that it may 'be adjusted Alaterally With respect to the other blade.

16. A piston cleaning tool comprising an encircling member; a pair of blades mounted in said member, each blade having two cutting edges one of which is on the end and the other on the side and the blades being mounted so that a side cutting edge shall be on each side o'l' the assembled pair of blades to clean and se ape thebottom and sides of the piston ring groove, and one of the blades having an elongated perforation therein so that it may be adjusted laterally With respect to the other blade; and a screw and Winged nut for tightly clamping the blades together in the adjusted position.

17. A piston cleaning tool comprising an encircling member having an operating handle; a spring-pressed holder slidably mounted in said handle;a pair of blades mounted in said holder, each blade'having two cut- Y ting edges one ofivhich is on the end `and the other on the side and the blades being mounted so that a side cutting edge shall be on each side ofthe assembledpair of blades to cleanand scrape the bottom andA sides ofr the piston ring groove, and one of the blades having an elongated perforation therein so thatit may be adjusted laterally with respect to the other blade; and a screw and winged nut for tightly clamping the blades together in the adjusted position.

In testimony whereof I atix my signature.

' JUAN KLEIN. 

